Borderlands 2 Tips

Moxxi Tipping
The following is an alternative way to get weapons:

1) Tip Moxxi in Sanctuary (over $10,000 in total), she will hand you a 1st weapon.
2) After awhile, come back to find Moxxi and tipping her again, she will give you another one!

note: There are only two type of weapons available from her — Fire Elemental Submachine Gun + Corrosive Elemental Submachine Gun